const Encrypt = require("./crypto.js");
const request = require("request");
const querystring = require("querystring");

request.debug = true;

function randomUserAgent() {
    const userAgentList = [
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36",
        "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1",
        "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1",
        "Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
        "Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
        "Mozilla/5.0 (Linux; Android 5.1.1; Nexus 6 Build/LYZ28E) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Mobile Safari/537.36",
        "Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Mobile/14F89;GameHelper",
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4",
        "Mozilla/5.0 (iPhone; CPU iPhone OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1",
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36",
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0",
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0",
        "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)",
        "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)",
        "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",
        "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Win64; x64; Trident/6.0)",
        "Mozilla/5.0 (Windows NT 6.3; Win64, x64; Trident/7.0; rv:11.0) like Gecko",
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/13.10586",
        "Mozilla/5.0 (iPad; CPU OS 10_0 like Mac OS X) AppleWebKit/602.1.38 (KHTML, like Gecko) Version/10.0 Mobile/14A300 Safari/602.1"
    ];
    const num = Math.floor(Math.random() * userAgentList.length);
    return userAgentList[num];
}

function getId() {
    const len = 32;
    const chars = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz123456789";
    const maxlen = chars.length;
    let rs = "";
    for (i = 0; i < len; i++) {
        rs += chars.charAt(Math.floor(Math.random() * maxlen));
    }
    return rs;
}

function createWebAPIRequest(
    host,
    path,
    method,
    data,
    cookie,
    callback,
    errorcallback
) {
    // console.log(cookie);
    if (cookie.match(/_csrf=[^(;|$)]+;/g))
        data.csrf_token = cookie.match(/_csrf=[^(;|$)]+/g)[0].slice(6);
    else data.csrf_token = "";
    const proxy = cookie.split("__proxy__")[1];
    cookie = cookie.split("__proxy__")[0];
    if (path === "/weapi/song/enhance/player/url") {
        const id = getId();
        cookie = `_ntes_nnid=${id},${Date.now()}; _ntes_nuid=${id};`;
    }
    const cryptoreq = Encrypt(data);
    const options = {
        url: `http://${host}${path}`,
        method: method,
        headers: {
            Accept: "*/*",
            "Accept-Language": "zh-CN,zh;q=0.8,gl;q=0.6,zh-TW;q=0.4",
            Connection: "keep-alive",
            "Content-Type": "application/x-www-form-urlencoded",
            Referer: "http://music.163.com",
            Host: "music.163.com",
            Cookie: cookie,
            "User-Agent": randomUserAgent()
        },
        body: querystring.stringify({
            params: cryptoreq.params,
            encSecKey: cryptoreq.encSecKey
        }),
        proxy: proxy
    };
    console.log(
        `[request] ${options.method} ${options.url} proxy:${options.proxy}`
    );

    request(options, function(error, res, body) {
        if (error) {
            console.error(error);
            errorcallback(error);
        } else {
            //解决 网易云 cookie 添加 .music.163.com 域设置。
            //如： Domain=.music.163.com
            let cookie = res.headers["set-cookie"];
            if (Array.isArray(cookie)) {
                cookie = cookie
                    .map(x => x.replace(/.music.163.com/g, ""))
                    .sort((a, b) => a.length - b.length);
            }
            callback(body, cookie);
        }
    });
}

function createRequest(path, method, data) {
    return new Promise((resolve, reject) => {
        const options = {
            url: `http://music.163.com${path}`,
            method: method,
            headers: {
                Referer: "http://music.163.com",
                Cookie: "appver=1.5.2",
                "Content-Type": "application/x-www-form-urlencoded",
                "User-Agent": randomUserAgent()
            }
        };

        if (method.toLowerCase() === "post") {
            options.body = data;
        }

        request(options, function(error, res, body) {
            if (error) {
                reject(error);
            } else {
                resolve(body);
            }
        });
    });
}
module.exports = {
    createWebAPIRequest,
    createRequest
};
